12957983 has 4 divisors (see below), whose sum is σ = 13404840. Its totient is φ = 12511128.

The previous prime is 12957953. The next prime is 12957991. The reversal of 12957983 is 38975921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38975921 = 103 ⋅378407.

It is a cyclic number.

It is not a de Polignac number, because 12957983 - 2¹⁶ = 12892447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12957913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223385 + ... + 223442.

It is an arithmetic number, because the mean of its divisors is an integer number (3351210).

Almost surely, 2^12957983 is an apocalyptic number.

12957983 is a deficient number, since it is larger than the sum of its proper divisors (446857).

12957983 is an equidigital number, since it uses as much as digits as its factorization.

12957983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446856.

The product of its digits is 136080, while the sum is 44.

The square root of 12957983 is about 3599.7198502106. The cubic root of 12957983 is about 234.8798722082.

The spelling of 12957983 in words is "twelve million, nine hundred fifty-seven thousand, nine hundred eighty-three".